786937domain: NPropertiesPrimalityPrimeyesAppears in sequences1/4 the number of n X n arrays of squares of integers with every 2X2 subblock summing to 21.at n=16A1592221/4 the number of n X n arrays of squares of integers with every 2X2 subblock summing to 27.at n=16A159227Prime numbersat n=62979